// utils/geometryUtils.js

/**
 * Parses a point string in the format "POINT (longitude latitude)" and returns an object with latitude and longitude as numbers.
 * @param {string} position - The position string in the format "POINT (longitude latitude)".
 * @returns {{latitude: number, longitude: number}} An object containing the latitude and longitude as numbers.
 */
export const parsePoint = (position) => {
  const [longitude, latitude] = position.slice(6, -1).split(" ");
  return { latitude: parseFloat(latitude), longitude: parseFloat(longitude) };
};

/**
 * Finds the closest points on a polyline to a new point.
 * @param {Array} coordinates - The coordinates of the polyline.
 * @param {Object} newPoint - The new point (with latitude and longitude).
 * @param {Object} map - The map object.
 * @returns {Array} The closest pair of points on the polyline.
 */
export const findClosestPoints = (coordinates, newPoint, map) => {
  if (!map) {
    console.error("Map is not defined. Cannot find closest points.");
    return [];
  }

  let minDist = Infinity;
  let closestPair = [];
  for (let i = 1; i < coordinates.length; i++) {
    const dist = L.LineUtil.pointToSegmentDistance(map.latLngToLayerPoint(newPoint), map.latLngToLayerPoint(coordinates[i - 1]), map.latLngToLayerPoint(coordinates[i]));
    if (dist < minDist) {
      minDist = dist;
      closestPair = [coordinates[i - 1], coordinates[i], i];
    }
  }
  return closestPair;
};